When Precise Workers Get Tired
6-axis industrial robots like KUKA, ABB, Yaskawa, and Fanuc owe their micron-level precision to complex servo hardware. Over time, a specific axis may start vibrating or losing its target position.
Causes of Vibration in Robot Axes
- Encoder Communication Errors: Absolute encoders in the joints may have dead batteries or cables broken from flexing. This causes the drive to misread the angle, leading to vibration (hunting).
- Drive (Amplifier) Fatigue: Power modules of the servo drive inside the controller cabinet may lose capacity due to heat. The drive cannot supply enough current for fast movements.
- Mechanical Backlash: Wear in the gearbox gears causes the robotic arm to shake a few millimeters even when the motor stops.
On-Site Robot Overhaul
Dismantling robot systems from the factory is difficult. Our experts come to your robot cabinet, pinpoint whether the issue is motor, encoder, or drive-related on-site, and repair the hardware in our lab.